Question 1130732
a. is 125/100 or 1.25 per year mean
b. is poisson distribution 

p(0)=e^(-1.25)*1.25^0/0!, which is e^(-1.25)=0.2865
p(1)=e^(-1.25)1.25^1/1!, which is 0.3581
p(2)=e^(-1.25)1.25^2/2!=0.2238
p(3)=e^-1.25)1.25^3/3!=0.0933
p(4)=0.0291
p(5)=0.0073
p(6) or more is 1- the above sum or 0.0019